Download Carrier Pro-Dialog CONTROL 4 Specifications

18 - STANDARD MAINTENANCE
•
Air conditioning equipment must be maintained by professional technicians, whilst routine checks can be carried out
locally by specialised technicians.
•
Simple preventive maintenance will allow you to get the
best performance from your HVAC unit:
• improved cooling performance
• reduced power consumption
• prevention of accidental component failure
• prevention of major time-consuming and costly
interventions
• protection of the environment
There are five maintenance levels for HVAC units, as
defined by the AFNOR X60-010 standard.
18.1 - Level 1 maintenance
See note below. Simple procedure can be carried out by
the user:
• Visual inspection for oil traces (sign of a refrigerant leak),
• Air heat exchanger (condenser) cleaning - see chapter
‘Condenser coil - level 1’,
• Check for removed protection devices, and badly
closed doors/covers,
• Check the unit alarm report when the unit does not work
(see report in the 30RB Pro-Dialog Plus control manual).
General visual inspection for any signs of deterioration.
18.2 - Level 2 maintenance
See note below. This level requires specific know-how in
the electrical, hydronic and mechanical fields. It is possible
that these skills are available locally: existence of a maintenance service, industrial site, specialised subcontractor.
In these cases, the following maintenance operations are
recommended.
Carry out all level 1 operations, then:
• At least once a year tighten the power circuit electrical
connections (see table with tightening torques opposite),
• Check and retighten all control/command connections,
if required (see table with tightening torques opposite),
• Remove the dust and clean the interior of the control
boxes, if required,
• Check the presence and the condition of the electrical
protection devices,
• Check the correct operation of all heaters,
• Replace the fuses every 3 years or every 15000 hours
(age-hardening),
• Check the water connections,
• Purge the water circuit (see chapter ‘Water flow control
procedure’),
• Clean the water filter (see chapter ‘Water flow control
procedure’),
• Fully clean the condensers with a low-pressure jet and
a bio-degradable cleaner (counter-current cleaning see chapter ‘Condenser coil - level 2),
• Replace the stuffing box packing of the pump after
10000 hours of operation,
50
Check the unit operating parameters and compare
them with previous values,
Keep and maintain a maintenance sheet, attached to
each HVAC unit.
All these operations require strict observation of adequate
safety measures: individual protection garments, compliance
with all industry regulations, compliance with applicable
local regulations and using common sense.
18.3 - Level 3 (or higher) maintenance
See note below. The maintenance at this level requires
specific skills/approval/tools and know-how and only the
manufacturer, his repre-sentative or authorised agent are
permitted to carry out these operations. These maintenance
operations concern for example:
• A major component replacement (compressor,
evaporator),
• Any intervention on the refrigerant circuit (handling
refrigerant),
• Changing of parameters set at the factory (application
change),
• Removal or dismantling of the HVAC unit,
• Any intervention due to a missed established
maintenance operation,
• Any intervention covered by the warranty.
Note: Any deviation or non-observation of these maintenance criteria will render
the guarantee conditions for the HVAC unit nul and void, and the manufacturer,
Carrier France, will no longer be held responsible.
18.4 - Tightening torques for the main electrical
connections
Component
DesignationValue
in the unit
(Nm)
M12 screw on bus bar, customer connection
80
Soldered screw PE, customer connection
80
Tunnel terminal screw, fuse holder
Fu-
3-3.5
Tunnel terminal screw, compressor contactor
KM1-->KM12
3-4.5
Brass screw M6, compressor earth
EC-
5
Screw M6, compressor connection
EC- 5
Tunnel terminal screw, disconnects
QM-
0.8-1.2
Screw M6, earth power distribution
10
18.5 - Tightening torques for the main bolts and screws
Screw type
Used forValue
(Nm)
Metal screw D=4.8
Condensing module, housing supports
4.2
Screw H M8
Condensing module, compressor fixing
18
Taptite screw M10
Condensing module, chassis - structure fixing
30
Taptite screw M6
Piping support, cowling
7
Screw H M8
Piping clip
12
Screw H M6
Piping clip
10
Nut H M10
Compressor chassis
30
18.6 - Condenser coil
We recommend, that finned coils are inspected regularly to
check the degree of fouling. This depends on the environment
where the unit is installed, and will be worse in urban and
industrial installations and near trees that shed their leaves.
For coil cleaning, two maintenance levels are used, based
on the AFNOR X60-010 standard: